Finding the Fourth Proportional to 1,020.56, 1,530.37 and 327.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.56 : 1,530.37 = 327.09 : x
2. Step 2: Convert to fraction form
   1,020.56/1,530.37 = 327.09/x
3. Step 3: Cross multiply
   1,020.56x = 1,530.37 × 327.09
4. Step 4: Simplify right side
   1,020.56x = 500,568.72
5. Step 5: Solve for x
   x = 500,568.72/1,020.56
6. Step 6: Final answer
   x = 490.48